package com.jd.util;


import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;

/**
 * 浜岀淮鐮佺敓鎴愬伐鍏�
 * @author 鏈卞瓙榫�
 *
 */
public class QRCodeUtil {

    private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    // 浜岀淮鐮佸昂瀵�
    private static final int QRCODE_SIZE = 300;
    // LOGO瀹藉害
    private static final int WIDTH = 60;
    // LOGO楂樺害
    private static final int HEIGHT = 60;


    /**
     * 鐢熸垚浜岀淮鐮�
     * @param content	婧愬唴瀹�
     * @param imgPath	鐢熸垚浜岀淮鐮佷繚瀛樼殑璺緞
     * @param needCompress	鏄惁瑕佸帇缂�
     * @return		杩斿洖浜岀淮鐮佸浘鐗�
     * @throws Exception
     */
    private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,
                hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 鎻掑叆鍥剧墖
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }

    /**
     * 鍦ㄧ敓鎴愮殑浜岀淮鐮佷腑鎻掑叆鍥剧墖
     * @param source
     * @param imgPath
     * @param needCompress
     * @throws Exception
     */
    private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
        File file = new File(imgPath);
        if (!file.exists()) {
            System.err.println("" + imgPath + "   璇ユ枃浠朵笉瀛樺湪锛�");
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 鍘嬬缉LOGO
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 缁樺埗缂╁皬鍚庣殑鍥�
            g.dispose();
            src = image;
        }
        // 鎻掑叆LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

    /**
     * 鐢熸垚甯ogo浜岀淮鐮侊紝骞朵繚瀛樺埌纾佺洏
     * @param content
     * @param imgPath	logo鍥剧墖
     * @param destPath
     * @param needCompress
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath, boolean needCompress,  String file ) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        mkdirs(destPath);
//        String file = new Random().nextInt(99999999) + ".jpg";//鐢熸垚闅忔満鏂囦欢鍚�
        ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
    }

    public static void mkdirs(String destPath) {
        File file = new File(destPath);
        // 褰撴枃浠跺す涓嶅瓨鍦ㄦ椂锛宮kdirs浼氳嚜鍔ㄥ垱寤哄灞傜洰褰曪紝鍖哄埆浜巑kdir銆�(mkdir濡傛灉鐖剁洰褰曚笉瀛樺湪鍒欎細鎶涘嚭寮傚父)
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

//    public static void encode(String content, String imgPath, String destPath) throws Exception {
//        QRCodeUtil.encode(content, imgPath, destPath, false);
//    }

//    public static void encode(String content, String destPath, boolean needCompress) throws Exception {
//        QRCodeUtil.encode(content, null, destPath, needCompress);
//    }
//
//    public static void encode(String content, String destPath) throws Exception {
//        QRCodeUtil.encode(content, null, destPath, false);
//    }
//
//    public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
//            throws Exception {
//        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
//        ImageIO.write(image, FORMAT_NAME, output);
//    }
//
//    public static void encode(String content, OutputStream output) throws Exception {
//        QRCodeUtil.encode(content, null, output, false);
//    }


    /**
     * 浠庝簩缁寸爜涓紝瑙ｆ瀽鏁版嵁
     * @param file	浜岀淮鐮佸浘鐗囨枃浠�
     * @return	 杩斿洖浠庝簩缁寸爜涓В鏋愬埌鐨勬暟鎹��
     * @throws Exception
     */
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

    /**
     * 浠庝簩缁寸爜涓紝瑙ｆ瀽鏁版嵁
     * @param path	浜岀淮鐮佸浘鐗囨枃浠惰矾寰�
     * @return	 杩斿洖浠庝簩缁寸爜涓В鏋愬埌鐨勬暟鎹��
     * @throws Exception
     */
    public static String decode(String path) throws Exception {
        return QRCodeUtil.decode(new File(path));
    }


}
